Which of the following is NOT classified as an eating disorder?

Weight cycling is not classified as an eating disorder. Instead, it refers to the pattern of losing and regaining weight repeatedly, often as a result of dieting. While it can be associated with eating disorders, it is more accurately described as a phenomenon related to weight management and health rather than a clinical disorder itself.

The eating disorders listed, including anorexia nervosa, binge eating disorder, and bulimia nervosa, are all characterized by specific patterns of eating behaviors and psychological issues surrounding food and body image. Anorexia nervosa involves severe restriction of food intake and an intense fear of gaining weight, while bulimia nervosa is marked by cycles of binge eating followed by compensatory behaviors such as vomiting or excessive exercise. Binge eating disorder consists of recurring episodes of eating large quantities of food, often feeling a lack of control during the episodes. Therefore, weight cycling stands apart as a behavioral pattern rather than a distinct eating disorder.